posted on June 28th 2007, at 15:34
by lunarg
Did a test on two DL380 G5 controllers to check out the difference between having a battery or not on a P400 SAS RAID controller. The results are remarkable, to say the least.

Both machines are fairly identical when looking at disk configuration: both have a P400 SAS controller with an equal amount of storage, but srv1 has 512MB with battery, srv2 has 256MB without battery.

I ran a dd test of a file, and this is the output:

srv1:~# dd if=/dev/zero of=./dump.dump bs=1k count=81920008192000+0 records in8192000+0 records out8388608000 bytes (8.4 GB) copied, 48.282 seconds, 174 MB/s

srv2:~# dd if=/dev/zero of=./dump.dump bs=1k count=51200005120000+0 records in5120000+0 recor  ...
last updated on December 3rd 2009, at 22:09 by lunarg

srv2 has a SmartArray P400 with 256MB and without BBU.

/media/blog/attachments/0d784991350dcfbf4afc1eb8c5c20326/d7274c0db0d6e8295f0e1c180c740a25.jpg
srv1.jpg
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36.79 KB
last updated on December 3rd 2009, at 22:07 by lunarg

srv1 has a SmartArray P400 with 512MB and BBU

/media/blog/attachments/0d784991350dcfbf4afc1eb8c5c20326/3d44cf0609c769295a821cf6e6838a44.jpg
srv2.jpg
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35.83 KB
 
 
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